<!DOCTYPE html>
<html>

<head>
    <title>伪元素 pseudo-element</title>
    <style type="text/css">
        /* 伪元素 */
        /*  p 的第一个字母被选中 */
        p:first-letter {
            color: red;
        }

        /*  p 的第一行被选中 */
        p:first-line {
            color: green;
        }
    </style>

</head>

<body>
    <div>
        <p>Find opportunities to reduce your Android app size by inspecting the contents of your app APK file, even if
            it
            wasn't built with Android Studio. Inspect the manifest file, resources, and DEX files. Compare two APKs to
            see
            how your app size changed between app versions.Any 64-bit Linux distribution that supports Gnome, KDE, or
            Unity
            DE; GNU C Library (glibc) 2.31 or later.
            x86_64 CPU architecture; 2nd generation Intel Core or newer, or AMD processor with support for AMD
            Virtualization (AMD-V) and SSSE3
            8 GB RAM or more
            8 GB of available disk space minimum (IDE + Android SDK + Android Emulator)
            1280 x 800 minimum screen resolution
        </p>
        <p>Second paragraph</p>
        <p>Last paragraph</p>
    </div>
</body>

</html>